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Rhode Island: below-average open trial sites
258 of 753 in-state trials are recruiting (34%); below the 37% national average by 3 percentage points, with Phase 2 weight.
According to ClinicalTrials.gov-derived indexes, Rhode Island sits in the lower half of US states by in-state trial count (#37 of 52 states by registered in-state trial count).
Rhode Island: 753 US clinical trials with in-state sites, 258 recruiting.
Rhode Island has 753 registered US clinical trials with a study site in-state, 258 of them currently recruiting (below the 37% national average by 3 percentage points). 90 of these trials are in Phase 3 (late-stage) and 145 in Phase 2. The most frequently studied condition in Rhode Island is Obesity, with 30 linked trials.
Thin-volume Rhode Island archive
Rhode Island's in-state trials target 527 patients on average (p2 by trial size among 52 states with enrollment data), smaller studies than most states. Treat this page as a compact local index (thin-volume · high-open), then jump to recruiting trials or methodology rather than expecting hub-scale coverage.
Below-average open, early-phase tilt
Rhode Island still shows 258 recruiting of 753 in-state trials (34% open), but below the 37% national average by 3 percentage points, so archived statuses weigh heavier than the national baseline.
- 34%
- open (below national share)
- 258
- still recruiting despite cool share
- 145
- Phase 2 rows in this footprint
- 30
- top: Obesity
Recruiting share is below the 37% national average by 3 percentage points. Counts include every study with at least one recorded site in the state. Registry reference only, not medical advice.
Rhode Island vs all states by indexed in-state trial count
Where this state's ClinicalTrials.gov site count sits among every state with at least one listed trial (coverage density, not care quality)
753 Top 71% more indexed trials than 29% of 52 states
States, banded by indexed in-state trial count
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov · 2026-08-08
Key findings
What ClinicalTrials.gov does not surface for Rhode Island on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Rhode Island open-enrollment share sits below the national baseline.
258 of 753 in-state trials (34.3%) are recruiting, against 37% nationally (-2.7 percentage points). Counts include every study with at least one recorded site in the state.
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Providence dominates Rhode Island's trial geography.
Providence lists 628 of 753 in-state trials (83.4%) across 224 named facilities. Cities need five or more listed trials to appear here; locations are as filed by sponsors.
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Obesity is the most-studied condition in Rhode Island.
30 of 753 in-state trials (4%) list Obesity. That is a local concentration figure, not a national disease ranking.
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One sponsor accounts for a large share of Rhode Island trials.
Brown University appears on 86 of 753 in-state trials (11.4%). Sponsor identity is as filed on ClinicalTrials.gov.
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361 Rhode Island trials carry a completed status.
361 of 753 (47.9%) are completed. The open share above is the remainder that still lists recruiting.
By Status
| Status | Trial count |
|---|---|
| Completed | 361 |
| Recruiting | 258 |
| Active | 134 |
By Phase
| Phase | Trial count |
|---|---|
| NA | 299 |
| Phase 2 | 145 |
| Phase 1 | 108 |
| Phase 3 | 90 |
| Phase 4 | 26 |
| Early Phase 1 | 4 |
Top Conditions
Top Sponsors
Where trials run in Rhode Island
Providence carries 628 of Rhode Island's 753 indexed trials (83%) across 224 named sites, ahead of Warwick at 39. 8 cities clear five listed trials, together naming 305 distinct sites.
| City | Trials | Listed sites |
|---|---|---|
| Providence | 628 | 224 |
| Warwick | 39 | 23 |
| East Providence | 25 | 18 |
| Johnston | 15 | 10 |
| Pawtucket | 14 | 12 |
| Cranston | 12 | 9 |
| East Greenwich | 9 | 7 |
| Kingston | 6 | 2 |
Distinct trials and named sites per city, as filed with ClinicalTrials.gov; cities under five trials omitted. Vintage 2026-08-08.
Trial size small
Rhode Island's in-state trials target 527 patients on average (p2 by trial size among 52 states with enrollment data), smaller studies than most states.
Rhode Island: in-state trial volume sits in the thin tercile
Geography is concentrated: Providence alone accounts for 83% of Rhode Island's indexed trials (628 of 753), with Warwick a distant second at 39.
Phase mix: 90 Phase 3 vs 145 Phase 2 (early-phase heavy).
Top condition: Obesity (30 trials); top sponsor Brown University (86).
thin-volume · high-open figures (753 trials · 34% open) describe registry geography under the trial size small read, not clinic capacity or protocol fit. Confirm status on ClinicalTrials.gov before acting.
States near Rhode Island on in-state trial volume
Cross-state peers under the trial size small read (thin-volume · high-open), not the same-state browse list.
Similar thin-volume peers (± open share)
- Delaware · 652 trials · 33% recruiting
- Idaho · 633 trials · 26% recruiting
- Nevada · 900 trials · 27% recruiting
- New Mexico · 579 trials · 29% recruiting
- Mississippi · 500 trials · 27% recruiting
Similar high-open peers (± trial volume)
- Oklahoma · 34% recruiting · 1,061 trials
- Pennsylvania · 34% recruiting · 6,946 trials
- Michigan · 34% recruiting · 4,790 trials
- Oregon · 34% recruiting · 1,999 trials
- South Carolina · 35% recruiting · 1,706 trials